Electrical conductor



(No Model.) 4 Y A. C. TICHENOR.

ELEGTRIGAL- GONDUOTOR.

No. 330,071. Patented Nov. 10, 1885.

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UNITED STATES PATENT OFFICE.

ANSON O. TICHENOR, OF SAN FRANCISCO, CALIFORNIA.

ELECTRICAL CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 330,071, dated November10, 1885.

Application filed February '7, 1885.

To all whom it may concern:

Be it known that I, Anson O. TICHENOR, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented certain new and useful Improvements inElectrical Cables or Conductors, of which the following is aspecification, reference being bad to the ac companying drawings.

My invention relates to electric cables or conductors; and it consistsin incasing or inclosing awire or metallic strip of any required lengthor size, surrounded or enveloped by a core or body of powdered orpulverized carbon in a tubular or other equivalent formed case or covercomposed of one or more layers or wrappings made of any substance ormaterial possessing suitable strength and flexibility, and covered orcoated with some protective insulating compound, substance, or material,as hereinafter described.

The object of my invention is to produce a cable or conductor fortelegraph, telephone, and other systems wherein electric currents areemployed which shall not only be a good conductor of electric currents,but shall also be free from induction from any cause or source, strongand durable, easily and readily used and handled, and cheaply andeconomically manufactured.

It is well known that when metallic condoctors are used in proximity toeach other great difficulty is often experienced in transmittingmessages telegraphically or telephonically on account of the inducedcurrents from such neighboring wires, and that to overcome suchinduction various devices and divers means have been employed, but sofar as I know with only partially successful results.

In the use of the conductor herein described I have found that no matterhow near it is placed to other conductors, even if wound around them,and whether above or below the surface of the earth, there is noinduction whatever, so that messages transmitted are received with equalloudness and distinctness as if there were no such neighboringconductors.

This invention is an improvement upon the conductor shown, described,and claimed in Letters Patent No. 300,410, granted to me Serial No.155,262. (No model.)

June 17, 1884, and is intended to and does overcome any possibility ofbreaking the electric current by reason of the pulverized carbonbecoming separated in the tubular case from or by any cause.

In the accompanying drawings, forming a part of this specification, andin which like letters refer to similar parts, Figure 1 shows a piece ofthe conductor with the wrappings removed at one end, and Fig. 2across-section of the same.

In these drawings the outermost wrapping is represented by a, the innernext to this by b, and the interior wrapping or tube by c. \Vithin thelatter at d is represented the pulverized filling of carbon or otherequivalent material, and in the center of such carbon core or fillingatf the wire or metallic strip of any required size. Upon each layer orwrapping as it is applied I preferably place a coating of asphaltum,rubber, paraffine, or other substance capable of resisting moisture andthe action of the elements, and on the outermost coveringI prefer toapply a coating of asbestus, asphaltum, or some equivalent protectivesubstance.

WVhen the conductor is constructed and prepared as described, it isready for immediate use. This cable or conductor may be manufactured indifferent ways, and I do not limit myself to any particular method ofmanufacture, but prefer to use the machinery and processes nowused,whicl1 are well known in the manufacture of submarine fuse forblasting. In said method a central thread of cotton or similar fibrousmaterial is employed, located within the filling of the fuse andextending throughout its whole length. This thread passes through thecore of pulverized material as it is forming within the tube, wrap, orenvelope, and is agitated in order to prevent the pulverized materialfrom choking up and leaving unoccupied places. In like manner the wireor suitable metallic strip is used in the manufacture of the cable orconductor herein described, care being taken that the machine is soadjusted as to keep the same in the center of the carbon core formedaround it as well as in the center of the tube formed by the wrappingsor cover. In this way a cable or conductor may be made of any requiredsize or length in which the wire or metallic strip will be surrounded orenveloped with a uniform thickness of the pulverized carbon throughoutits entire length, the whole being of uniform size and strength.

The diameter of the tube containing the wire or metallic strip andpulverized carbon must be proportioned to thesize of such wire or strip,and should be at least three times as great.

When used as a conductor for electric lighting, I have found a muchsmaller wire or metallie strip may be used than is now employed for suchpurposes with equally good if not superior results.

Having thus described my invention, What lVitnesses:

CHARLES S. HYER, RUssELL H. Sco'r'r.

